Marksman Hand Operated Siphon Pump for Transfer of Air And Liquids

When used as an air pump it works fine but when used as a fluid pump it has a few problems.When pumping fast some liquid leaks out around the handle, which considering I was using it for petrol at the time was a little worrying. However at a reduced pump rate it works fine.I ordered two of these, one for transfering fuel from a container to my car and the other as a bilge pump for kayaking. The one I was originally using for fuel stopped working at one point so I switched to the other, however after rinsing out with high pressure water funtionality returned. No problems with the other one so far.